package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        Page<Category> list = (Page<Category>) categoryMapper.list(categoryPageQueryDTO.getName(), categoryPageQueryDTO.getType());
        return new PageResult(list.getTotal(), list.getResult());
    }

    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        categoryMapper.update(category);
    }

    @Override
    public void setStatus(Integer status, Long id) {
        Category category = Category.builder().id(id).status(status).build();
        categoryMapper.update(category);
    }

    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        //默认为禁用
        category.setStatus(StatusConstant.DISABLE);
        categoryMapper.insert(category);
    }

    @Override
    public void deleteById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了，抛出业务异常
        if (dishMapper.countByCategoryId(id) > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //查询当前分类是否关联了套餐，如果关联了，抛出业务异常
        if (setmealMapper.countByCategoryId(id) > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.deleteById(id);
    }

    @Override
    public List<Category> list(Integer type) {
        return categoryMapper.list(null, type);
    }

    @Override
    public List<Category> listOnSale(Integer type) {
        return categoryMapper.listByStatus(StatusConstant.ENABLE, type);
    }
}
